Thanks for the hint. We're very aware and racing is certainly not our focus. There are many, many flight control projects which offer navigation and do a great job at it and we have a lot of respect for them. The focus area for PX4 is higher-end systems that require vision-based navigation, avoidance, integration into airspace and alike features.
Nonetheless, we find it fun at times to fly in Acro and it is a good way to validate the core performance of the attitude control loop.